Evidence map›Paper›PMID 33530952›Full record

ArticleBMC cancer2021

Inhibition of Kpnβ1 mediated nuclear import enhances cisplatin chemosensitivity in cervical cancer.

Ru-Pin Alicia Chi, Pauline van der Watt, Wei Wei, Michael J Birrer, Virna D Leaner

Open access · goldAbstract read
In one paragraph

Article in BMC cancer, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.2field-weighted citation impact, top 22% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 20 citations in OpenAlex.

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  3. VCP's nuclear journey: Initiated by interacting with KPNB1 to repair DNA damage.Proceedings of the National Academy of Sciences of the United States of America · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 2 countries.

Ru-Pin Alicia ChiDivision of Medical Biochemistry & Structural Biology, Department of Integrative Biomedical Sciences, SAMRC/UCT Gynaecological Cancer Research Centre, Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town, 7925, South Africa.
Pauline van der WattDivision of Medical Biochemistry & Structural Biology, Department of Integrative Biomedical Sciences, SAMRC/UCT Gynaecological Cancer Research Centre, Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town, 7925, South Africa.
Wei WeiPfizer, Andover, MA, 01810, USA.
Michael J BirrerUniversity of Arkansas Medical Sciences, D Winthrop P. Rockefeller Cancer Institute, Little Rock, AR, USA.
Virna D LeanerDivision of Medical Biochemistry & Structural Biology, Department of Integrative Biomedical Sciences, SAMRC/UCT Gynaecological Cancer Research Centre, Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town, 7925, South Africa. Virna.Leaner@uct.ac.za.ORCID http://orcid.org/0000-0002-0417-8610
South African Medical Research Council · ZAPfizer (United States) · USWinthrop Rockefeller Foundation · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundInhibition of nuclear import via Karyopherin beta 1 (Kpnβ1) shows potential as an anti-cancer approach. This study investigated the use of nuclear import inhibitor, INI-43, in combination with cisplatin.

methodsCervical cancer cells were pre-treated with INI-43 before treatment with cisplatin, and MTT cell viability and apoptosis assays performed. Activity and localisation of p53 and NFκB was determined after co-treatment of cells.

resultsPre-treatment of cervical cancer cells with INI-43 at sublethal concentrations enhanced cisplatin sensitivity, evident through decreased cell viability and enhanced apoptosis. Kpnβ1 knock-down cells similarly displayed increased sensitivity to cisplatin. Combination index determination using the Chou-Talalay method revealed that INI-43 and cisplatin engaged in synergistic interactions. p53 was found to be involved in the cell death response to combination treatment as its inhibition abolished the enhanced cell death observed. INI-43 pre-treatment resulted in moderately stabilized p53 and induced p53 reporter activity, which translated to increased p21 and decreased Mcl-1 upon cisplatin combination treatment. Furthermore, cisplatin treatment led to nuclear import of NFκB, which was diminished upon pre-treatment with INI-43. NFκB reporter activity and expression of NFκB transcriptional targets, cyclin D1, c-Myc and XIAP, showed decreased levels after combination treatment compared to single cisplatin treatment and this associated with enhanced DNA damage.

conclusionsTaken together, this study shows that INI-43 pre-treatment significantly enhances cisplatin sensitivity in cervical cancer cells, mediated through stabilization of p53 and decreased nuclear import of NFκB. Hence this study suggests the possible synergistic use of nuclear import inhibition and cisplatin to treat cervical cancer.

Indexed as

Drug SynergismActive Transport, Cell NucleusAntineoplastic AgentsApoptosisbeta KaryopherinsBiomarkers, TumorCell MovementCell ProliferationCisplatinDrug Therapy, CombinationFemaleGene Expression Regulation, NeoplasticHumansPyrrolesQuinoxalinesTumor Cells, CulturedAntineoplastic Agentsbeta KaryopherinsBiomarkers, TumorCisplatinKPNB1 protein, humannuclear import inhibitor INI-43PyrrolesQuinoxalinesCervical cancerCisplatinINI-43NFκBNuclear importp53

Identifiers

PMID33530952
PMCPMC7852134
OpenAlexW3129012562

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.